Question

SELECT * FROM
Table_A
LEFT JOIN Table_B
 ON (Table_A.A_ID = Table_B.A_ID)
INNER JOIN Table_C ON (Table_C.C_ID = Table_B.C_ID)
WHERE Table_A.ID = 3

This returns 0 rows, currently.

How can I set this up so I always get Table_A, even if there is no row for Table_B or Table_C. I still want to maintain the INNER JOIN between Table_B and Table_C, so that I will never get a B without a C.

Answer 1

Sub query the Table B and Table C. e.g.

SELECT * 
FROM Table_A 
LEFT JOIN 
    (SELECT * 
         FROM Table_B
         INNER JOIN Table_C ON (Table_C.C_ID = Table_B.C_ID)
    ) B_AND_C ON (Table_A.A_ID = B_AND_C.A_ID)
WHERE Table_A.ID = 3